[Bug 79240] New: [HSW]Piglit/spec_ARB_fragment_program_fp-indirections2 randomly causes *ERROR* Hangcheck timer elapsed... blitter ring idle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79240

          Priority: medium
            Bug ID: 79240
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW]Piglit/spec_ARB_fragment_program_fp-indirections2
                    randomly causes *ERROR* Hangcheck timer elapsed...
                    blitter ring idle
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 99824
  --> https://bugs.freedesktop.org/attachment.cgi?id=99824&action=edit
dmesg

System Environment:
--------------------------
Platform: Ironlake
Libdrm:       
(master)libdrm-2.4.54-9-g8fc62ca8ac010659023bb63c4759eb683de4f9af
Mesa:        (master)c2c639ecf667b4b7cf17cfe33dfe710432f2c43a
Xserver:   
(master)xorg-server-1.15.99.902-97-gdb2e708f31a162c6c66643d3559dd5f3e21ee06b
Xf86_video_intel:(master)2.99.911-206-g605fcd9050efc816ac8163e8d626f466d98261c2
Libva:        (staging)35e70cb9b9c77dfb99fb370e319ed501f0c31b17
Libva_intel_driver:(staging)ca1acd54eb59eadabfb40a4b61df2e8968b5e00d
Kernel:    (drm-intel-nightly)c37f30ddc2921eccbf0be87c7742b56fbde53a81

Bug detailed description:
-----------------------------
Run bin/fp-indirections2 -auto, It randomly causes <3>[  223.918559]
[drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... blitter ring
idle.
It happens 1 in 10 runs on Haswell with -fixes kernel. Run 10 cycles on -queued
kernel, it works well.

output:
Max TEX instructions / TEX indirections: 1024 / 1024
PIGLIT: {'result': 'pass' }

Reproduce steps:
----------------------------
1. xinit
2. bin/fp-indirections2 -auto

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